Side stitching a mattress



Patented May 16, 1933 omrw srTES:

SIDE STITCHING A MATTRESS Application filed February 2 1, 1930. Serial No, 430,173.

line of stitching to supply the thread' for the v newly formed stitch. Thedrawing'of the thread from one stitch to another is'secured by applying a pulling strain on the thread simultaneously at a plurality of'points along the linev of stitching thereby obviating the strain whichwould be put on thethread if the entire force for pulling the thread forward to formeach stitch were applied at the needle end of the thread. I

In order to give an understanding of my invention I have illustrated herein one way of practicing it which will now lbe described, after which the novel features will be pointed out in the appended claims.

'Fig. l ofthe drawngs is a perspective view V illustrating the manner in which Vthe side stitch is inserted in the mattress.

Figs. 2, 3, 4, 5, 6 and 8 are Sectional fragmentary views showing steps in the process of side stitching the mattress.

Fig. 7 is a Vfragmentary view illustr'atingl the character of the side stitching.

Before describing the manner in which the,

stitches are formed I will refer to the character of the side stitching..

In the drawings 1 indicates the mattress and in Fig.. 7 is A side stitching. The mattress comprises the usual tickin'g and the filling material 3. The side Vstitching comprises a series of stitches 4, each entering the ticking at one point-and passing around a quantity 25 of the filling and then emerging from theticking at another point. The successive or adjacent stitches are connected by the short portions 5 of thread which lie on the outside of the ticking. i In the construction shown, the stitches are so arranged relative, to each other that there is a slight overlapping of adjacent stitches, each end of each stitch overla pping somewhat the meetingiend j acent stitch. For instance, as shown in Fig.

illustrated the character of of anad- 7, the point 6 where the thread of each'stitch temerges from the ticking is situated slightly. beyond the point 7 where the next stitch enters'the ticking. For convenience I will refer tothe points 7 where `the'thread of eachU stitchenters the ticking as the point'of'en trance,,, and the vpoint 6 where each stitch i emerges.l from the vticking as the point of emergence. The portions of 'thread between the point of emergence 6 of one stitch and the point of entrance 7 of the adjacent stitch constitute short connecting portions which lie on thel outside of the ticking. With Vthis manner of stitching there will be formedl small closed' loopsl 8 constituted by 'overlapi ping ends of. two adjacent stitches and larger open loops constituting the stitches propert; All the stitches lie in the same plane and the`= points of entrance and points of emergence: for a series of connected stitches are. all the sameline. Y p This stitching is 'formed through the me-, dium. of a curved needle 10 which is manipp ulated so that it entersV the ticking at a point of entrancef7 at one end of the stitch Lland passes around throughthe fillingB in a Vcurved path and emergesfrom the tickingat a point of emergence 6 at the other end. of the stitch,H the thread 14 which is attached to the'needle being drawn aroundthrough the filling in. the ,same curved path thereby to produce the stitch 4. After the needle has made one pass it is shifted alonglthe sideV edge ofthemattress into a. position to form the nextistitch but the distance which it is thus shifted is; slightly less than theV length of the stitchfi previously ,formed so that when the 'needle enters the mattress for making the second stitch the second point 7 of entrance will .be in the rear of the point 6 ofA emergence for the previous stitch. The second stitch is then formed in the manner above described, the

curved needle passing through the filling 3':

fromfthe point of entryV 7 to the point of emergence. In order to vform this second stitch,V however, it isnecessary to draw theV thread through the mattress from the entry point 7 to the emergence point 6, andto en- T oFFce f oscAn frnnvo; oF convoy;l MAssAcHUsETTs, assrenoa 'ro UNITED ivrATrrnEss esov able this operation to be performed myvimproved method contemplates acting on thegl portion 5 of the thread between the point of emergence 6 of the first stitch and the point of entry 7 of the next stitch thereby to draw a sufiicient length of thread through the. previous stitch to form the next stitch. This operationis repeated as the successive stitches are made so that as the stitching proceeds the thread is acted upon at each pont 5 todraw from the previous stitch enough threadto form another stitch, this length of thread thus being passed from one stitch to another and on to the needle as thesuocessive stitches are formed.

The drawings show in a somewhat diagrammatic manner a device by which this operation of' drawing the thread from one stitch to another may be carried out. As shownin Fig. 1, I propose to employ a device comprising a plurality of rotary pins 11 which are arranged so as to encircle the mattress 1 to beside stitched, said pins bearing against the side face 12 of the mattress. The pins are preferably so situated that they press into the side face of the mattress slightly thereby causing the mattress to bulge out betweenthe pins as shown at 13. These pins aresuitably supported and are .each capable of rota-ting. The pins Will also be spaced apart a distance slightly less than the total length, of each stitch 4. The various steps involved'in forming the stitches are best seen in Figs. 2 to 6 inclusive. Fig. 2 illustrates, for instance, the beginning of the first stitch. The needle 10 is placed so that it will enter the ticking 2 at the point 7 which is closely adjacent one of the pins 11 and the needle is carriedaro-und through the mattress filling as above described and will emerge from the ticking at the point 6 which is on the opposite Vside'of the next adjacent pin lla.. The needle thus lencirclestwo adjacent pins during its passthrough the filling. Fig. 2 shows the needle'just entering the mattress and Fig. 3 shows the point of the needle just emerging fromthe mattress. It will be understood, of course, that the needle has the thread 14 attached thereto.

' From the position shown in Fig. 3 the needle is given another half turn into the dotted lines shown in Fig. 5, this operation drawinga length of thread around through; the filling of the mattress to form the stitch 4:. When the needle has thus, made one pass it is shiftedfrom the left hand dotted line positionshovvn in Fig. 5 backwardly to the full line position and then is shifted longitudinally vof the ticking in the right hand dotted line position shown in Fig. v5, this operation, ofcourse, drawing the thread 14 through the filling of the mattress. When the needle has been brought to the right hand dotted'line positionin Fig. 5 it is given another turn or pass which carries it intothe tickingat the point 'Ya onthe opposite side of the pin llo from which it emerged in forming the previous stitch, the needle being carried through the mattress as shown in Fig. 8 and emerging from the point a just beyond the pin llb, the said needle in its second pass also the stitches formed' in sufiicient quantity tov supply the threadfor the next stitch; This operation is repeated as each stitch is formed" and until the stitching has been carried clear around the mattress.

By the time the stitching is completed'all ofthe pins are operating' to draw' thread from one stitch and deliver it to the nextv stitch. Since the thread is thus delivered from one stitch to another it follows there is no accumulatedstrain on the threadV atthe needle end for the thread'at the needle is at no time subjected to any greater strain than is necessary to draw the thread through 'the mattress for-the formationof a single stitch.

It will be understood, ofcourse, that any suitable mechanism may be employed for manipulatingthe needle and merely as illustratng a. device adapted for this purpose I have'shown a swinging needle-gripping arm 16 which is mounted on a rock shaft 17` situated at the center ofthe curvature of the needle. The end 18 of this arm is arranged to grip the needle as the arm swings in the direction of the arrow in Fig. 2 therebyl to turn the needle around as shown' in Fig; 3, the needle being guided in such movement through a guide member '19. VVhen the arm` 16 has been swung into position shown in Fig. 3, the point of the needle has emerged from the ticking and the arm into position shown in Fig. 4 to grip the point of the needle. The arm is .then given another half rotation to bring A the needle into the dotted line position Fig. 5 thereby to drawV the thread through the mattressfor. formation of the stitch and atv this time the shaftfi 17 yis Vmoved awayv from the mattress to carry the needle into the full line position Fig. 5 thereby clearing-the needle from the mattress and then it is shifted alongto the-right hand? dotted line position which places the needle ready for the next pass through the mattress and the above operations are repeated.

It will be understood'that one or more lines of stitching may be inserted in the side edge of the mattress. Fig. 1` shows three lines'ofl stitching being inserted but the method here-v is then swung backv lis in described is applicable to one or more lines of stitching.v

After the stitching has been carried clear around the mattress the pins 11 are then withdrawn from the loops 8. I propose to withdraw these pins progressively beginning with the pin at the first stitch and as each pin is withdrawn the rotation of the succeeding pins will serve to tighten the stitch at which the pin is withdrawn. The stitches are thus tightened progressively around the mattress.

In carrying 'out this method all the stitches of any row of connected stitches are formed in the same plane and all the points of entrance and points of emergence for the different stitchesvof the said row are in line with each other.

I claim;

1. The method of side stitching a mattress which consists in forming a series of connected stitches in the side of the mattress, all of which occupy the same plane, by carrying the thread for each stitch into the ticking at one point and around a portion` of the filling and then out through the ticking at another point spaced from the entering point ofthe adjacent stitch, whereby there will be a short length of thread on the outside of the ticking for each stitch and applying an independent pulling force on each such short length with the application of the independent pulling forces on all the short lengths occurring simultaneously, whereby each independent pulling force draws from one stitch for delivery to the next stitch a sufficient length of thread tol form a new stitch.

2. The method of side stitching a mattress which consists in inserting the thread through the ticking at the side face of a mattress at a point of entrance, passing the thread around a portion of the filling and out through the ticking at a' point of emergence, again inserting the thread through the ticking at a second point of entrance situated in line with the first two points but s paced from the point of emergence and passing the thread again around a portion of the filling and out through the ticking at a second point of emergence also in line with the other points, repeating these operations to form a series of stitches around the side face of the mattress which are connected by short lengths of thread on the outside of the mattress, and applying an independent pulling force on each such short length with the application of the independent pulling forces on all the short lengths occurring simultaneously whereby each independent pulling force draws from one stitch for delivery'to the next stitch a sufficient length of thread to form a new stitch.

In testimony whereof, I have signed my name to this specification.

OSCAR TERVO. 

